Case file LinkedIn Crossclimb #832: 4-letter ladder, 5 middle exhibits, combo prompt "A compound word for where a student might write down info for their classes.". Endpoints: NOTE (top) and BOOK (bottom).
Middle phase answers: "Where eyeglasses might rest" = NOSE; "Attachment to a fire hydrant" = HOSE; "Emcee of a television show" = HOST; "Make a sound like an owl" = HOOT; "Curved item at the end of a fishing line" = HOOK.
Ordering phase: the valid middle chain is NOSE → HOSE → HOST → HOOT → HOOK. This permutation is the only valid one-letter chain for these answers.
Evidence link: NOTE → NOSE. T→S at the third letter (NOTE → NOSE).
Evidence link: NOSE → HOSE. N→H at the first letter (NOSE → HOSE).
Evidence link: HOSE → HOST. E→T at the fourth letter (HOSE → HOST).
Evidence link: HOST → HOOT. S→O at the third letter (HOST → HOOT).
Evidence link: HOOT → HOOK. T→K at the fourth letter (HOOT → HOOK).
Evidence link: HOOK → BOOK. H→B at the first letter (HOOK → BOOK).
Verdict: NOTE → NOSE → HOSE → HOST → HOOT → HOOK → BOOK satisfies every one-letter constraint. The combo clue "A compound word for where a student might write down info for their classes." describes both end words together — "NOTE" and "BOOK" each differ by one letter from their adjacent middle rungs and satisfy the shared top+bottom prompt.